Calculating-machine.



C. E. PRAT-T.

GALGULATING MACHINE;

APPLIUATION FILED DEo.19,`191o.

1,006,787. Patented 0011241911.,

8 SHEETS-SHEET 1.

G. E. PRAT-T.

GALOULATING MAGHINE. APPLICATION FILED DB0. 19, 1910.

Patented Oct. 24, 191 1.

8 SHEETS-SHEET 2.

INVENTUR ATTGRNEY C. E. PRATT. GALCULATING MACHINE.

APPLICATION FILED 13110.19, 1910. Q 1,006,787, Patented Oct. 24, 1911.

8 SHEETS-SHEET 3.

WITNESSES:

ATTORNEY C. E. PRATT. CALGULATING MACHINE.

APPLIOATION FILED 11110.19, 1910.

Patented 001124, 191,1.

' a SHBBTFS'EBBT 4.

WITN ESSES:

C. E. PRATT.

CALGULATING MACHINE. APPLIOATION FILED 11110.19, 1910.

Patented 0015.24, 1911.

8 SHEETS-SHEET 5.

WITNESSES:

' ATTORNEY C. E. PRATT. GALCULATING MACHINE. APPLICATION FILED 11110.19,1910.

Patented 001.211.911,

8 SHEETS-SHEET 6.

INVENTOR WITNESSES' ATTORNEY C. E. PRATT. GALGULATING MACHINE.APPLICATION FILED DEQ. 19, 1910.

' Patented 001211911.

, .I NN R, www m 1. A A \m I I l Q n Q @LNE ATTORNEY C. E. PRATT.

' CALOULATING MACHINE. APPLIOATIONFILBD 11110.19, 1910.

Patented 0013.2

UNITED STATES PATENT onrion.

CHARLES E. PRATT, OF CHICAGO, ILLINOIS, ASSIGNOR TO A. B. DICK COMPANY,OF

CHICAGO. ILLINOIS, A CORPORATION OF ILLINOIS. I

CALCULATINGr-MACHINE.

Specification of Letters Patent.

Patented Oct. 24.-', 1911.

Application filed December 19, 1910. Serial No. 597,985.

To all whom it may concern:

Be it known that I, CHARLES E. PRATT, a citizen ofthe United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Calculating-Machines, ofwhich the following is a' specification.

This invention relates to calculating machines, adapted particularly for'performing the operations -of addition and subtraction and indicatingor recording the result.

The object of the invention is to provide a mechanism of this characterwhich is reliable in operation'which is of simple and strongconstruction, which may be easily and rapidly operated and which can bemanufactured and assembled at comparatively low cost.

The invention involves numerous novel features which will be hereinafterdescribedA and claimed, these including the general construction and thearrangement of the parts of the machine and the construction of theindividual elements and groups of lparts.`

and value; thus, each of the several'numher-- wheels of the totalizer islocked against movement at all times except when the'actuating mechanismis moved into position for actuating a wheel, whereupon that particularwheel will be unlocked and if it is neces'- l tions due to accidentalsary to carry over from one wheel to the next higher wheel such higherwheel will be unlocked just long enough to permit its operation. In thisway, erroneous calculaation of a number-wheel are prevented.

I have illustrated an embodiment of my invention in the accompanyindrawings as applied to a typewriting mac ine, and this is a use forwhich the improved mechanism is'particularly well adapted but I wish it`away in part; Fig. 20 isl displacement or actuunderstood'that theinventionis in no way limited in this respect, as the invention may` beemployed in a simple calculatingI and indicating machine, such a machineprovided with a listing attachment, or other forms of calculatingmachines.

Furthermore, the invention is not'limited to the use of theseveralmechanisms herein shown in combination, as many of mechanisms maybe used in connection with devices quite different from those herein'shown; thus my improved 'totalizer 'or the improved key-actuated devicesmay be used in the forms various constructions and for varioususes.

In the drawings, Figure 1 is. a central section of the machine on line1--1 of Fig. 2; Fig. 2 is a transverse sectional elevation cn line 2-2of Fig.l 1; Fig. 3 is a detail view of one of the key-actuatedmechanisms; Fig.

4 is a view of certain of the parts shownin Fig. 3, illustrating theother positions of those parts; Fig. 5 is 4a horizontal section, showingthe key-actuated mechanisms; Figs. 6, 7,89 and 10 are views showing fiveof the key-actuated mechanisms; Fig. 11 isa vertical longitudinalsection through the reversing gearing; Fig. 12 is a plan view of thesame, broken away in part; Fig. `13 is a section on line 1'3-13 of'Fig.11; Fig. 14 is a view of the mechanism for actuating the master-pinion;Fig. 15 is a top` view of a portion of the calculating mechanism; Fig.16 is a front view of the carriage forA the masterp1nion;,Fig. 17 is asection of the herein shown in machines ofv these carriage shown 1n Fig.16; Fig. 18 is a sec-l tion through the totalizer; Fig. 19 is a view ofthe totalizer from the rear thereof, broken tion through the totaliZer;Figs. 21 and 22 are detail views of parts of the totalizer; Figs. 23 and24 are sections through the totalizer on linesQS-Q and 24:-24respectively; and Fig. 25 is a detail view ofone of the locks of thetotalizer.

The calculating mechanism is 'shown in the drawings as applied to atypewriting machine having the numeral-keys varranged 1n a row extendingacross the machine at the back of the .-keyboard. In its generalconstrue' 105 tion, the calculating'mechanism comprises a shaftextending across the machine parallel to this row of numeral-keys andabove the same, this shaft carrying a number of gears,

and a plurality of actuating mechanisms;

a longitudinal secany desired osition, and the numeral-wheels eachoperated by one of the numeralkeys to move into engagement with a gearon this shaft, actuate the gear and thenl return to initial position.This 'shaft is geared to a o second shaft extending parallel thereto andcarrying a master-pinion which is adapted to slide upon itin accordancewith the move- -inent of the typewriter carriage, and this gearingbetween the two shafts is 1()4 so. arranged .that it may be reversed asde^ preferably sired, in order to adapt the machine for per- `formingoperations. either in addition or subtraction. The totalizer is mountedupon abar extendingacross the machine, and is so arranged that it may beaixed thereto in of, this tota izer are adapted to be'engagedsuccessively and operated by the masterinion asl the vlatter is movedvalong from eft to right as the carriage of the typewriter moves fromright to left..

,Referring now to the drawings, a type- 6writing machine. of well knownconstruction 1s shown, this machine having a plurality of .keys l,thevkey-bars of which arejpivotally mounted upon a shaft 2 extendingacross the machine. The row of keys 3 at the rear of thev keyboard arethe numeral-keys. 4 indi- Cates the spacing-bar. When any key isdepressed, it operates through a link 5 to turn a vkey-bar 6 about thepivotal axis 7 of allk of the key-bars, so as ,to cause the type on thatkey-bar to print on the paper passing around the impression-roller 8.Alsohwhen any key-bar is operated, it turns the pivotally-mounted member9, so as to actuate the 'escapement-pawl 10, this pawl coacting with anescapement-wheel 11, so that when operated it allows the wheel 11 tomove the distance represented by one of the teeth thereon. Thevescapement-wheel 11 is on the same shaft with a pinion 12 ,which coactswith a rack'13 secured to the carriage of the typewriting machine,sothat the escapement gova right to left, this to move upon rollers 15which run on suiterns the movement of the carriage from movement beingcaused by a' spring in the usualmanner. The spacingbar`4 is alsoarranged to operate the escapement. The carriage of thetypewritingmachine isvshown at 414, this being arranged Vablezsupportsmountedupon the frame of the machine. A arev shown at 16,

i frame of the machine, is

anism. In these side-plates j ournaled a shaft 23 carrying a pluralityof gears 24. A v plurality of mechanis s are provided, -each actuated byone of the numeral-'keys and each adapted to engage and operate one ofthese gears 24 and the shaft 23, and the extent to which shaft 23 isactuated by these mechanisms corresponds to the value of the keydepressed. One of these mechanisms will and 5 of the drawings, and thenrthe differences between the several key-actuated mechanisms will bepointed out.

25 to a digit-piece or sector 26 mounted upon a shaft 27extendingbetween the side-frames 22. This sector' has a camslot therein,the major portion of which is concentric with the shaft 27, but theforward end of which is turned toward that ried by a frame or support29, the latter consisting of a strip of sheet-metal pivotally tendingbetween the side-frames 22. The support 29" and the sector `26 areprevented from moving laterally upon ltheir-"supporting shaftsfby meansofsuitable collars setecth'of the gear 24 on shaft 23, which liesdirectly above the driving-gear 31. The driving-gear 3l need not have afull coma portion of the periphery of this gear. EX- tendin'g throughthe gear 31 is a pin'32, to .one end of which is secured vthe end of .aspring 33, the other'end of this spring being gear 31 is mounted' andsecured thereto, so, that the spring 33 exerts atension upon thedriving-gear to turn it in a clockwise direcprojects `beyond the face ofthe driving-gear 31 on the side opposite that on which the spring 33islocated, and this portion of the pin moves in a slot ornotch formed'inthe supportingplate 29, so as to limit the rotaplurality of tabulating-keys tively tothe support in both directions. The Vdrlving-gear 31 iscut away, as shown at 35 V`in ig. 5 and by the dotted line 36 in Fig. 3,

than the width of the gear, so that the teeth of the gear are continuedaround this vcutaway portion. The gear 24 on shaft 23vis of such size oris so disposed that it will be actuated by the teeth of the'driving-gear 31 adjacent to the. cutaway portion 35, well as by theother teeth on the driving.- gear. The periphery of'the sector ordigit-- piece 26 iscut so as to-provide a project ing portion 37 adaptedto engage the wall 36 at the bottom of the cutaway portion 35 shaft. fThis cam-slot receives a pin 23 car cured thereto. At its forward or`free end..V the support 29 carries a driving gear3l, the teeth of whichare adapted to mesh with the plenient of teeth, as teeth are used. onlyon mona] movement of the driving-gear rela-` in the driving-gear 31. Thesector 25'being be described in connection with Figs. 3, 4 I

Each numeral-key is connected by a rod pivotally mounted at one end upona shaft 30 eX- coiled about thepivot-pin 34 o n which the tion, as seenin Figs. 3 and 4. The pin this-.cutaway portion being of a width less ofless width than the width of the cutaway portion 35 and being mounted soas to lie close to the adjacent face of the support 29, the projectingportion 37 thereof will enter the cutaway portion 35 and engage thebottom wall of the cutaway portion near the lower edge thereof. When theportion 37 does engage the driving-gear 31thus, it will turn the gear ina counter-clockwise direction against the tensin of the spring 33, butwhen it is desired to return sector 26 to its initial position, thereturn movement thereof can be effected without actuating thedriving-gear 31 at all, for there has occurred no interlock of thesector 26 and the gear 31, such as would have occurred had gear-teethbeen employed for actuating the drivinggear meshing with the teeth onthat gear.

The key-actuated mechanism shown in Figs. 3 and 4, is that for the No. 2key. `The mechanisms for the Nos. 1 and 3 lkeys are like that shown forthe No. 2 key with two exceptions only: First, the cutaway portions 35on the driving gears 31 are somewhat differently disposed so thatthosedriving gears will be moved from the positionof rest the appropriatedistance by the projecting portions 37 on tors 26; and second, the notchin the sup'- portv 29 in which the stop-pin Av32 moves is -somewhatlonger in .thev case of the mechanism for the No. 3 key and somewhatshorter in the case of the No. 1 key; the movement of the driving gearof the No. 1 mechanism is so Vshort that means for the pin 32 in thatcase vis preferably a slot as shown at the left in Fig. 5.

The mechanism for the No. 3 key is shown in 'Fig 6. The position 'of thecutaway portion 35 in the case of the mechanism for the No. the drivinggear 31 will be moved a distance equal to one of the teeth thereon, inthe case of the No. 2 driving gear the movement will be equal to twoteeth and in the case of the No. 3 driving gea'rthey movement will beequal to threev teeth; In each of these cases the movement of thedriving gear is edected by the projection 37 fn the corresponding sector26 engaging the bottom of the cutaway portion 35 and in that wayoperating the driving gear. A

movement equal to three teeth of the driv-v ing gear can be readilyobtained in this manner, but for greater movement I prefer to employother and additional -means for effectingxa portion of the movement'ofthe driving gear. nism for the No.

7 key is shown in Fig. 10

. and from an inspectionof this figure it will be seen that the teeth onthe driving gear 31 extend around that gear in a counter-clockwisedirection a substantial distance beyond the cutaway portion 35, andalso, that four teeth 38 are provided upon the periphery of the sector26 atthe forward edge thereof the corresponding sec-' themovement-limitingA Pivotally mounted upon The key-actuating mecha-4adapted to engage and actuate the driving 'gear 31. By depressing .theconnecting rod 25, the teeth 38 engage and actuate the driving gear andas these teeth pass out of mesh with the driving gear, the projectingportion 37 comes into engagement with the bottom wall of the cutaway.ortion 35 and actuates the driving gear arther, the whole movementlbeing a distance equal-to--seven teeth. The notch in the support 29which receives the pin 32 is in-this case made of substantially greaterlength as is kshown in Fig.- 10. Figs. 7, 8 and 9 show the keyactuatedmechanism for the 4, 5 and 6 keys respectively; it will be seen that thesectors 26 in these cases are provided with one, two and three teeth 38respectively and that the notches..which receive the stop-pins 32 areprogressively increased in length. With these three mechanisms thedriving gears 31 will be actuated by to one, two and three teethrespectively, whereupon'the projecting lportion 37 on the sector 26 willengage the bottom wall of the cutaway portion v35],and actuate thedriving gear through the remainder of its .appropriate movement.

Eachof the digit-pieces or sectors 26 has a ratchet-plate 39 securedthereto, this being bent so v-that it lies substantially concentric withthe shaft 27 though preferably its forward end. extends slightly awayrom shaft 27 this ratchet-plate has ratchet teeth on bothjsides thereof,the teeth on one side being inclined vin the direction opposite to thoseon the other side and the two endsl of the ratchet plate are oppositelybeveled.

side of each sector 26 is a pawl 40 acted upon by springs 41 to hold ityieldingly in a central position. The free end of the pawl 40 is turnedlaterally as shown at 42 and this lateral projection is beveled Q asshown. When the sector 26 is moved forwardly from the position shown inFig. 3, the end 42 strikes the forward beveled end of p'awlplate 39, isdepressed thereby and rides on the under surface of the pawl-plate andthus enforces complete forward movement of the sector 26 before i-t canbe returnedz At the end of the forward movement ofthe the springs 41move the pawl 40v upwardly slightly so that at the beginning of thereturn movement of the sector, the end 42 of the pawl strikes the rearbeveled end of the pawl-plate and is raised thereby and thereteeth 38 adistance equal the shaft 30 at the sector,

after the end 42 rides on the upper surface ,return movement'of thesector before it can be again moved forward. Preferably each .sector 26is provided with an upwardly extending projection 43 adapted to engagethe shaft 30 or a collar thereon to limit the return movement of thesector 26. Each ofthe number keys 3 is preferably provided with .titi

a depending link 44 (Fig. l) adapted to enter a hall-race 45 in whichare a plurality f of balls 4G of such size and so disposed that f onlyone number key 3 can be depressed at a time.

The operation of this portion of 'the mechanism is as follows: `When anynumber key'is depressed it operates through the connecting rod 25 toturn the corresponding digit-piece orsector 2G forwardly. At thebeginning of this forward movement and hefore the sector engages itselfwith the cooperating driving gear, the cam-slot in the sector operateson thty pin 28 to raise the free end of the support 29 until the drivinggear carriedthereby comes into mesh with the coacting gear Q4 on shaft23 and the concentric portion of the cam-slot thereafter holds thesegears in mesh. After the gears are in mesh, the sector comes into engagement with the driving gear 31 and turns that a distance correspondingto the value of the key depressed.l In every case the movement of thedriving gear is effected h5' the engagement of the projecting portion257 with the bottoni wall ofthe cutaway portion in the driving gear 3land in some cases the movement of the driving gear is additionally et?cted hy one or more teeth on the peripheryT of the sector 26 meshingwith and operating the teeth on the driving gear. By reason of thisprovision of the cutaway portion 35 with which the projecting portion 3Ton the sector ,cooperates at the end of the forward movement of thesector, the latter 'ill he free to retract withoutactuating the drivinggear and entirely free thereof after it has reached the end of itsforward movement hy the completion of the depression of the number keyand after that kev has heen released that it may he returmfd by itsspring. This return movement of the sector cannot he begun until 'thedownward movement has heen completed because of the prov on ot thepawl-plate 39 and coacting pawl 40. ,fis the return movement of the keyand sector 26 is nearing completion .the cam-slot in the sector willoperate the piu :'28 to lower the supinorting frame 29 and thus carrythe driving gear 3f out of meslrwvith the `gear 24 on shaft .As soon asthe driving gear disei'igages gear 524 it is restored to its initialposition by the spring llhen a key is depressed, the correspondingdriving gea i' will thus he positively' actuated a predetermined amountand excessive movement of the driving gear due to momentum or to anyother cause, is eifectually and positively prevented by the provision ofthe pin 32 and the wall at the end of the notch in the frame 29 whichlimits the movement of the driving gear in the forward direction. Thereturn movement of the driving gear When. it disengages the gear 24 alsolimited in the same way actuated an .amount corresponding to the valueof the key depressed; that this movement of the shaft 24 is effected bycausing the key to first move a driving gear into mesh with a gear onthdt shaft, then actuate the driving gear theappropriate amount, thendisengage the driving Gear from'the gear on that shaft and then returnthe driving gear to its initial position;,and that a movement of therequired amount in each case is assured, since the movement is effectedpositively, a full stroke in every case is enforced vand over-running'due to momentum or any other cause is positively prevented. y

It is sometimes desirable to use the typewriting machine and to operatethe number keys thereon without actuating the calculating mechanism andll have therefore pro-v vided means whereby the'calculating mechanismmay be rendered operative or inoperative, as desired. ln the presentinstance,

'I have shown this means as comprising devices for moving the shaft Qain the direction of its length so that when the driving gears 3l areraised by the depression of the keys, they will not come into mesh withthe gears Referring to Figs. l, 2 and l5, it will be seen that the shaft23 is arranged so that it can move axially in its bearings, and at oneend it has secured to it a gear 44 and adjacent to the geai a collar 45having a circumferential groove therein. This groove receives the pin 46carried by an operating lever 47 which is pivotally mounted upon aprojection 48 of the sideplate 22. By moving the lever 47 to one side orthe other, the shaft 23 'can be moved4 axially so that the gears 24thereon will. be in the plane ofthe driving gears 31 orlaterally"displaced from the planes of the driving gears. When shaft 23is moved to carry the gears 24 out of the planes of the driving gears31, the gear 44 is carried into mesh with a projection 49 on the sideplate 22 so that not only will shaft 23 be disconnected from itsoperating' devices but also it will be positively locked againstmovement by the partsf44 and 49.

The shaft Q3 is arranged to drive another shafton which Yis a slidingpinion moved back and fort-h upon its shaft accorda-nce with themovement of the typewriter-carorder to permit ofl using the calculatingmechanism for additionV cr subtraction, at will. In the present instancethe shaft of the sliding pinion is shown. at 50, this shaft beingmounted for rotation in bearings carried by the side-frames 22, and thegearing connecting the shafts 23 and 50 is arranged at the right of themachine inclosed vwithin a suitable casing 51 as shown in Figs. 2 and15. Referring now to Figs. 11, 12 and 13, it will be seen that the shaft23 is provided with a pinion 53 which meshes with the gear -54 mountedupon a short shaft 55 extending between the side-plate 22 and an auxiliary frame-plate 56. This gear 54 has an opening therethrough in whichslides a pin 57 carried by a gear 58 and causing gear 58 to turn alwayswith gear 54. At the side of the gear 58 is a disk 59 and the gear anddisk are secured to a hub at the end of which is a disk 60 of the samensize-as' the disk 59. Rotatable upon this hub and between the gear'58and the disk 60 is a gear The shaft 50 Vcarrying the slidingmaster-pinion enters the gear-casing and" carries a pinion 66 which isadapted to mesh with one or the other of the gears 58 and 61. The gear58 always rotates with the gear 54 by reason of the pin 57 connectingthem, and between the gears 58 and 6l, are

- interposed reversing gears so that gear 61 is always driven in thedirection opposite that in which gear 58 is driven. On the end of theshaft 23 beyond the gearl 53 is a gear 62 adapted to slide freely onshaft 23 and having a hubat its side so that the side of the gearengages the disk 59 and the hub engages the disk 60, the gear 62 beingheld thus always in mesh with the gear 58. On a shaft 64 extendingvbetween the side-plate 22 and the auxiliary plate 56 is a sliding gear63 having an integral hub 65, this gear being held by the disks 59 and60 always in mesh with the gear 61. And furthermore, the gears 63 and 62are of such width that they overlap and are always in mesh. Pivotallymounted on thecasing 51 is a handle 67 having arms 68'at its inner endembracing the pinion 63 and adapted to vmore it and through it the parts62, 60, 61,

58, 59 and 57 laterally to the position in which these parts are shownlin Fig. 13 ortov the position in which these parts are shown in Fig. 12.When handle 67 is in the position shown in Fig. 12 where it .is arrestedby a pin marked A for addition, the shaft 50 of the slidingmaster-pinion is driven in one directionby the shaft 23 through the@aparts 53,54, 57, 58 and 66.I When lever 67 lis moved to the oppositeposition, shown 1n Fig. 13, where it is arrested by a pin marked S forsubtraction, the shaft 50 of the sliding master-pinion is driven in theopposite direction by the shaft 23 through the parts 53, 54, 57, 58, 62,63, 51 and e6.

I have described the reversing mechanism here illustrated in thedrawings in detail, but any other suitable form of reversiblegearconnection between the shafts 23 and.

50 may be employed. Y

The auxiliary frameplate 56 may be used to support one end of certain ofthe shafts, as the shafts 50, 27 and 30, instead .of carry# ing thoseshafts through it and to supporting openings or bearings formed in theadjacent side-plate 22. In the drawings, this construction is shown. Theshaft 30 may be extended through its supporting opening in plate 56 asshown in Figs. 11 and 15 and on its end may be loosely pivoted a latch56 held by a spring 57 in engagement with the gear 54 to preventaccidental operation of that gear in one direction.

The master-pinion is shown atw 69, this being arranged to'slide back andforth upon the shaft 5() and to rotate with that shaft, the pinionbeingsupplied with a'suitable spline extending into a groove in the shaft.'Ihe/pinion'V is arrangedto move from left V(to right' upon the shaft inaccordance with the movement of the typewriter-carriage from right toleft. The means by which this movement ofthe pinion is effected, willnow be described. Extending between the sideplate 22 at the left of themachine and the auxiliary frame-plate 56, and secured at its endsthereto, is a bar or'guide 70 on which a carriage 71 is adapted totrave]l bac-k and forth. This carriage shown in detail in Figs. 16 and17. The frame thereof is of rectangular form and has four rollers 72 secured to the rear facethereof,fthe two upper ones traveling on the upperedge of the bar and the two lower ones traveling on the lower edgeof'that bar. To the bottom portion of the frame 71 are secured outwardlyextending arms of the sliding pinion 69, these arms being connected by astrip 74, the arms 73 embracing the pinion 69 so as to cause the pinionto move with the carriage. The screw 75 secures to the carriage arack-bar 76 having i 14 and 15 it will be seen that the rear face ofLthe bar 70 has a' stud 78 thereon forming a 73 one on either side pivotfor a gear 79 and'pinion 80 which are secured together. The gear'7 9meshes with the rack 76. Secured to the carriage of the typewriter is abar 81 the up er edge of which is preferably serrated. short rack lpinion 80'.

bar Slifand to receive a thumb-screw 85.

The end of this screw is adapted to engage a pressure-plate 86 so as toforce that plate against the serrations on the upper surface of bar 81and'thus "secure the rack 82 to the bar 81. rlhis rack 82 when movedalong by the carriage of the typewriter engages and operates the pinion80. Rack 82 is also provided with a forwardly extending flange. 93

adapted to travel under a flange. 94 on a piece secured to the rear faceof the bar 70 so as to insure engagement of rack 82 with It is importantthat the sliding pinion should be lprevented from moving at all timesexcept when movement thereof is dcsired and 'I have therefore providedmeans for locking the pinion against movement except when the rack 82engages the pinion 80.-

Pivotally mounted upon the rear face of the bar are two locking levers8"? and 88 each provided withv a projection 89 and acted upon by aspring 90 in a direction to carry the projection 89 into engagement withthe teeth of the pinion 80. .Each of the levers 87 land' 88 is alsoprovided with an upwardly extending projection 91 which, when theprojections 89 are in locking position, lie in the path of the extension83 on the rack .82, this extension forming a'cam the sides of which areinclined. Just as the rack 82 enout of engagement with the teeth of thepinion 80 and thus unlock the actu-ating devices for effecting thetravel of the masterpinion upon its shaft. The levers 87 and 88 lmay beprovided with upwardly extending heels 92 which coact with the cams 88to prevent movement of the levers 8T and 88 to unlocking position, whilethe racl; 82 is approaching the pinion 80, but before it has come intoengagement with the pinion. Extending between the sides plate 22 and theauxiliary plate 56 is a bar 95- upon which the tota-litter is detachablymounted. This totalizer is supported on twoside-plates 96 which at theirlower ends are connected by a bar through which a screw 97 extends, thisscrewbeing adapted to engage .the bar 95 so asto secure the totalizerthereto. ln this way the totalizer can be readily detached and vsecuredto bar 95 in any desired position along the lengthof that bar. lllithin.the 'totalizer is a shaft 98 extending between the side-plates 96, onwhich shaft a plurality of wheels 99 are 4adapted to rotate freely.

wheel to the next adjacent wheel.

neem/erf These wheels are adapted to be engaged and operated bythemaster-pinion 69 and they are herein termed the number wheels. Thesewheels 99 may be used to indicate the results of the operations inaddition and subtraction by providing them with suitable numerals, butfor convenience in displaying the results of the mathematicaloperations, I .prefer to employ other wheels geared to the numher-wheels99 for this purpose. I

have thereforeshown a plurality of wheels 100 each geared to one of thewheels 99 and eachmeshing with a pinion 101 affixed to an indicatingwheel102, rotatable upon a shaft 108 extending between the side-plates96. Each of the pinions 101 has ten teeth and on -the periphery of eachwheel 102 are ar ranged .figures from zero to nine. The top and front ofthe totalizer is closed by a casing'104 secured to the side-plates 96and having openings therein through which one ligure on each of thewheels 102 may be seen. 1n the present instance each of thenumber-wheels 99 is shown as provided with twenty teeth, but the numberof teeth may be ten or any multiple thereof.

The; totalizer herein shown is providedwith means whereby .each of thenumber wheels is locked against operation so that it. is held positivelyfrom moving at'all times except `when it is desired to operate thenumber wheel in the ordinary operation, or in the operation' of carryingover from one rlhis feature of the invention is of great importance forin this way accidental movement or displacement of a wheel such as wouldcause an erroneous calculation to be exhibit-- ed is effectually guardedagainst. This means for locking thel number wheels is combined with thecarrying mechanism for carrying over from one 'wheel to the next adjacent wheel and these mechanisms will now be described.

Extending between the side-frames 96 of the totali-er is a shaft 105 onwhich a plurality of pinions 106 are freely rotatable and laterallymovable. Each of these pinions is provided with a circumferential grooveadapted to receive pins extending toward each from the ends ofbifurcated arms on a lever 10'?. Each of these levers 10T( is pivotallymounted between two bars 108 and 109 extending between the side-frames96, and the upper end of each lever enters an opene ing in a strip 110extending between the side-frames96. Each lever 107 has two pins 111projecting from one side thereof, the ends-of which are oppositelyinclined as shown in F ig. 20. Extending between theh crank lever 115(Fig.

with the pins 111 on the levers 107. A spring 114 acts upon each lever113 to hold it in the position in lwhich it is shown in Fig. 18 and eachlever 113 is guided inits rocking movement upon shaft 112 by having itsforward edge Aenter a vertical slot in the bar 108. When any lever 113is rocked upon its pivot against the tension of its spring 114, from theposition shown in Fig. 23 to the position shown in Fig. 211, its bevelededges act upon the beveled pins 111 on the corresponding lever 107 torock the latter on its pivot so as to move the pinion 106 to which thatlever` 107 Ais connected laterally upon its shaft 105. In. Fig. l20 oneof the levers 113 is shown as so moved, its, lever 107 rocked and thecorresponding pinion 10 6 moved laterally. When any pmion 106 1smovedlaterally thus, it is moved out of engagement with the locking device.One of these locking devices is provided for each of the pinions 106 andit consists of a bell- 23) adapted to rock freely upon a shaft 116extending between the side-frames 96. .()ne arm of this bellcrank leverMis provided at its forward end with a downwardly extending tooth,which,

-when the corresponding pinion 106 is in hormal position, engages withthe teeth of that pinion to hold the pinion against movement exceptunder certain conditions when the bell-crank lever is rocked so as tofree the pinion as will be hereinafter described.

teeth; next to it is a In Fig.'20 it will be seen that the pinion 106which has been moved laterally is out of engagement with its lockinglever 115, whereas the two pinions 106 on opposite sides of that pinionare in engagement with their locking levers 115. Each of thenumber-wheels 99 comprises three sections which are secured together orare formed integral. @ne of these sections is provided with a fullcomplement of regularly-spaced gear-teeth- 119, in the present instancetwenty such section having two teeth diametrically opposite each otheras indicated at 117, in Figs. 20 and 24. Next to this section is asection having two depressions 118 diametrically 'opposite each other.Each pinion 106 meshes at all times with the teeth 119 of thecorresponding number-wheel 99. When a pinion 106 is in .its normalposition it extends into the plane of the section of the number-wheel oflowerfd'enomination having the two diametrically opposite teeth 117thereon. The lateral movement of any pinion 106 eected by levers 107 and113, as above described, carries ,that pinion 'to such position that itcannot be actuated by the teeth 117 of the number-wheel of lowerdenomination, though the pinion still remains in mesh with the teeth 119of the number-wheel of higher denomination. Each bell-crank lever-115has a downwardly extending arm provided with a projection at its lowerend adapted to enter on'e of the notches 118 in the gear-wheel which is'of the lower denomination'of the two connected by the pinion 106 whichis locked by that bell-crank 115. The operationv of these parts is asfollows,freference being had principally to Fig. 20: Suppose themaster-pinion is in meshjvith the number-wheel indicated by the letter Ain that figure. In that case the pinion between that number-wheel andthe number-wheel of lower denomination will have been moved laterally asit is shown in Fig. 20, so that it will be out of engagement with thelockingl bell-crank lever 115 and will therefore be free to rotate. Alsothat pinion will have been moved 'out of the plane of the two teeth 117on the number-wheel of lower denomination so that when the pinion isturned it cannot operate the gear-wheel of lower denomination. If themaster-pinion vbe actuated it will cause rotation o wheel 102 lby whichthe result is indicated. Vhen the actuation of the number-wheel A hasbeen suficient to require the carrying of one to the number-wheel ofnextv higher denomination, one of the teeth 117 on the gear wheel -Awill engage -and actuate the pinion 106 indicated by the letter B andwill vturnthat pinion a distance equal to one tooth thereof. The pinionB, being in mesh with the number-wheel of next higher denomination, thenthe number-wheel A, indicated by the letter-C, will cause thatnumber-wheel to rotate a distance equal to one unit. It will be observedthat the pinion B has not been moved laterally to carry it out of theplane ofits locking lever 115, but this locking lever is rocked on itspivotal support 116 to raise it out of engagement with the pinion Bwhile that pinion is moving a distance equal to 'one of .its teeth, Thisrocking of the bell-crank is eifected by the pinion B itself, therocking of lever 115-at this time being permitted by one of thenotches118 on the number-wheel A, coming opposite the projection on thelower end of lever 115. One of'these notches 118 on number-wheel f .thenumber-wheel A and the corresponding A comes into position to permit therocking A hold its free end down upon the corresponding pinion 106. Therejection on each lever which engages 't e teeth of the pinion 106 isinclinedr at its sides sd that it will readily ride over the teethoztthe pinion, when the pinion is moving in eitherdirection.

the locking mechanism 'of each of the normally locked number-wheels isoperated to unlock th'at wheel, to permit of actuating the wheel in thenormal operation of the machine for addition or subtraction. I haveabove described the means for unlocking a wheel when necessaryfor thepurpose of carrying one to that wheel. Each ofthe levers 113 is providedwith a downwardly extending projection 122, these several projectionsbeing normally in alinement. Secured to the frame 71 which actuates themaster-pinion is a bracket 123 (Figs. 16 and 17 on which a roller 124 ispivotally mounted so as to turn about a. vertical axis. rlhis braaketalso carries an upwardly extending projection 125 having a cam surfacethereon, this cam surface being displaced laterally from the roller 124.The roller 124 and the cam 125, therefore move back and for-th with themaster-pinion 69. llhenv the master-pinion moves into engagement with anumber-wheel 99, the roller 124 engages the projection 122 ot the lever113 governing the position of the pinion 106, which connects thatnumber-wheel with the adjacent number-wheel of lower denomination, sothat that pinion 106 will be automatically moved laterally to release itfrom its locking lever 115. Thus as the master-pinion moves successivelyfrom one number-wheel to the next one, the pinion. connecting thatnumber- Wheel to the adjacent one of lower denomination, will bemoved-laterally to its unlocking position, while all of the othernumber-wheels will be held locked by their pinions 106 and lockinglevers 115, except when they are momentarily released to permit otcarrying over from one wheel to the next. When the roller 124 moves awayfrom the projection 122 on lever 1113, that lever will be normallyrestored to initial. position by the spring 114 so that the pinion 106moved 4thereby will be restored to its normal and locked position. Iprefer, however, to provide a positively acting means for restoring thelocking device in this way. This is done by the'cam 125 which travelsalong on the side of the projections 122 opposite that engaged by theroller 124 and which positively restores each lever 11.3 immediatelyafter it has beendisengaged by the roller 124, and that roller has movedto the neXt lever 113.

ln order to position the numerals on Wheels 122 accurately with respectto the openings in the casing 104, l have provided wan alining devicewhich is automatically actuated each time the master-pinion is movedfrom one wheel to the next adjacent wheel. This aiming device consistsof a the bar 128.

ineens? vpair of arms 126 pivotaliy `Inountedupon a shaft 127 extendingbetween side-frames 96 and carrying at their free ends a bar-128;

a "spring-.129actsvupon the arms 126 to depress them to apositionin'which they are arrested hy a stop 130. The bar 12S issharpened at its upper edge so that this edge will readily enter betweenthe teeth 119 on the number-wheels 99 so as to accurately aline thosewheels and the wheels 100 and 102 connected thereto. bar .128 isprovided with teeth, as shown in Fig. 19', the sides of which areinclined, Vthese teeth being arranged at intervals correspondingwith theintervals between the number-wheels 99. At the forward edge of the framecarrying the master-pinion and projecting forward from the strip 74thereof is a stud 131(l `igs. 16 and 17) the sides of which are inclinedand this stud is adapted to engage the teeth on. the lower edge of Asthe master-pinion is moved from one number-wheel to the next one, thestud 131 engages a tooth on bar 12:5 and raises that bar against thetension ot spring 129 so as to force the upperedge ot the bar in betweenthe teeth on each ot the numberwheels 991 l/Vhen the master-pinion comesto rest in coaction with a number-wheel, the stud 131 has moved to aposition midway between two teeth on bar 126, and spring 129 then forcesthe bar out of coaction with the number-wheels, so that themaster-pinion may actuate the number-wheel with which it is then inmesh.

Secured to frame 7'1 and projecting newardly therefrom is an index 132the upper end of which is bent :forward ly and is'. adapt-- ed to travelalone' an index-plate 11:3 sccured to the top or the casing on theiatalizer and provided with markii M snfiwn in Fig. 15. rlfhis indexmovi g' with the master-pinion and scale serve to show whichnumber-wheel, that is, which rifoluinn. will be ali'ected by theoperation ot' the masterpinion.

Having described my invention., what l claim as new therein und desireto secure oy Letters Patent olf the United States is:

1. IThe conilnnai'ion of a typewriter having a row ot numeral keys. ashaft extending across the front oi the machine parallel to said row,mechanisn'x actuated by said keys for turning said shatta lietanee co1'-responding to the value oit' the key depressed, means tor renderinglsaid mechanism oj'ieralive or,inoperative lio turn said shaft, a secondshaft extending across the Front oithe machine parallel to said slialftand flriven thereby, a master-pinion slidahle thereon, means tor movingsaid pinion, and a totalizer actuated by said pinion, suhstantially asset forth.

The combination ot a typewriter having a row of numeral keys, a shaftextend- .lOl

keys for turning said shaft a ing across the front of the machineparallel to said row, mechanism actuated bysaid distance correspondingto the value of the key depressed, a second shaft extending across thefrontiof the machine parallel to said shaft,

earinor between said shafts means for re-j versing the direction ofdrive of said gearing for addition or `subtraction, a vmasterpinionslidable on said second shaft, means for moving said pinion, and atotalizer actuated by said pinion, substantially as `set forth.

3. The combination of a typewriter having a row of numeral'keys, a shaftextending across the front of the machine parallel to said row,mechanism actuated by said keys for turning said shaft a distancecorresponding to the value of the key depressed, means for disconnectingthe shaft from said mechanism and simultaneously locking the shaftagainst rotation, a second shaft extending across lthe front of themachine' parallel to said shaft and driven thereby, a -maste'r-pinionslidable on said second shaft, meansfor moving said pinion, and atotalizer actuated by said pinion, substantially as set forth. 1

4. The combination of a typewriter having a row of numeral keys, a shaftextending across the front of the machine parallel to said row,mechanism actuated by said keys for turning said shaft a distancecorrespending to the value of the key depressed, means for disconnectingthe shaft from said mechanism and simultaneously locking the shaftagainst rotation, a second shaft eX- tending across the front of themachine parallel to said shaft and driven thereby, gearing between saidshafts, means for reversing the direction in which said second shaft isdriven by said gearing for addition orsubtraction, a pinion sli dableupon said second shaft, means for moving the-pinion, a bar parallel tosaid second shaft and a totalizer detachably mounted upon said bar,substantially as set forth.

. 5. The combination of a typewriter havmg ing across the front of themachine parallel to csaid row, mechanism actuated by said keys forturn-ing said shaft a distance cor` responding to the value of the keydepressed, means for disconnecting the shaft from said mechanism andsimultaneously locking th'e' shaft against rotation, a second .shaftextending across the front of the machine parallel to said shaft anddriven thereby, gearing between said shafts, means which said.

for reversing the direction in second shaft is driven by said gearingfor addition or subtraction,

a pinion slidable upon said second shaft, a carr ewriter, meansad3ustably mounted on t P the carriage for moving said'pinion in cor-,

a row of numeral keys, a shaft extendiage for said a shaft adapted to bea shaft adapted to be driven thereby,

-sponding .member bodily in i and shaft, means respondence with but at agreater iate than the movement of said carriage, a bar parallel to saidsecond shaft and a totalizer detachably mounted upon said bar,substantially as set forth.

l 6. VThe combination of a plurality of keys, a shaft adapted to bedriven thereby, a plurality of rotatable driving -members for operatingsaid shaft, a connection from each key to one of said members, and meansactuated by the depression of a key for moving tlie'corresponding memberabout an aXis eccentric thereto to carry it into driving relation toysaid shaft and then operating the member, substantially as set forth.

7. The combination .of a plurality of keys,

driven thereby, a plurality of rotatable driving members for operatingsaid shaft, a connection from each key to one-of said members, meansactuated by the depression of a key for moving the corresponding memberabout an axis ecceritric thereto to carryit into driving relation tosaid shaft and then operating the member, means for returninga'depressed key to initial position, and means operated on the return ofa depressed key for disconnecting said member and shaft, substantiallyas set forth.

8. The combination of a plurality of keys,

rality of driving members for operating said shaft, a connection fromeach key to one of said members, means actuated by the depression of akey for moving -the corresponding member bodily inthe plane in which itlies into driving relation to said shaft and then operating the member,and means for preventing overthrow of said member when actuated by itskey, substantially as set forth. p v

9. The combination of a plurality of keys, a shaft adaptedto be .driventhereby, a plurality of driving members for operating. said shaft, aconnection from each key to one of said members, means actuated by thedepression of a key for moving the correthe plane in which it lies intodriving relation to said shaft and then operating the member, means forreturning a depressed key to initial position, means operated on thereturn of a depressed key for disconnecting said member for returningthe member to initial position when so disconnected, and means forpreventing excessive movement ofthe member when so returned,substantially as set forth.

10. The combination ofy a .plurality of keys, a shaft adapted to berotated thereby, a lplurality of gears on said shaft, a plurality ofdriving gears each corresponding to one of'said (gears, a pluralityofmembers each connecte to one `of said keys, v and ',means actuated byany member when moved a pluby the depression of a key for first moving adriving gear in the plane 1n 'Whiehit lies into mesh With thecorresponding gear on' said shaft and then rotating the driving i gear adistance corresponding to the value -a plurality7 of lgears on saidshaft, a plurality of driving gears eachcorresponding to one of saidgears. a plurality of members each connected to one of said keys, meansactuated by any member when moved by the depression of a key for firstmoving a driving gear about an axis eccentric thereto into mesh with thecorresponding gear on.

said shaft and then rotating the driving gear a distance correspondingto the value of the key depressed, and means for limiting the extent ofrotation of each of said driving gears in both directions, substantiallyas set forth. y

'12. The combination of a plurality of keys, a shaft, a plurality ofgears on said shaft, a plurality of driving gears each corresponding toone of said gears, a plurality of pivotally mounted members on each ofwhich one of the driving gears is mounted, and means actuated by thedepression of a key for turning one of said members on its pivot tocarry the driving gear thereon into mesh With the corresponding'gear onsaid shaft and then rotating the driving gear a distance correspondingto the value of the key depressed, substantially as set forth.

13. The combination of a plurality of keys, a shaft adapted to berotated thereby, a pluralityof gears on said shaft, a plurality ofdriving gears each corresponding to one of said gears, a connectionfromeach key to one of said driving gears, means ac.- tuated by thedepression of a key for moving the driving gear connected thereto intomesh with the corresponding gear on said shaft and then turning saiddriving gear, means for returning a depressed key to initial position,means operated when a depressed key is returned for disconnecting saiddriving gear from the corresponding gear on said shaft, a' spring forreturning each driving gear to initial position, and means forpreventing excessive return movement of the driving gear, substantiallyas set forth.

14. The combination of a plurality of keys, a shaft, a plurality'- ofgears thereon, a plurality of driving gears each correspond ing to oneof said gears, a plurality of pivotally mounted frames on each of whichone of said driving gears is ivotally `mounted, a connection trom eachrey to one fof said frames, and means operated by the depression of anykey for rocking the corresponding trame to carry the driving gearthereon into mesh with the corresponding gear on accessi:

' said shaft and for then actuating the driving gear .to rotate theshaft, substantially as set forth.y i V 15. The combination of -aplurality vof keys, a shaft, a plurality of gears thereon, a pluralityof driving gears each correspond-v 'ing to one of said-gears, aplurality of pivotally mounted frames on each of which one 0f saiddriving gears is pivotally mounted, means connecting each key to a frameand actuated by the depression of a key for rocking the correspondingframe to carry its driving gear into mesh With the corresponding gear onsaid shaft and for then actuating the driving gear to rotate the shaft,and means for preventing excessive movement of said driving gear,substantially as set forth.

16. The combination of a plurality of keys, a shaft, a plurality'ofgears thereon, a plurality of driving gears normally out of engagementwith. said gears, means for mov-l ing any driving gear bodily in theplane in 'which it lies to carry it into engagement v with thecorrespondingpgearon said shaft,

and means for actuating the several driving gears by said keys amountscorresponding to` the valuesiof-the keys, substantially fas set forth.

17. The combination of a plurality of keys,va shaft, a plurality ofgears thereon, a plurality of driving gears normally out of engagementwith said gears, means for moving any'driving gear bodily in the planein which it lies to carry it into engagement With the corresponding gearon said shaft,

means for actuating the several driving' gears by said keys amountscorresponding to the' value of the keys, and means for rendering all ofsaid driving gears inoperative to actuate said shaft, substantially' asset forth.

18. The combination of a shaft, a gear thereon, afpivotally mounted`support, a driving gear rotatably-mounted thereon, a pivotally mountedmember having a cam surface thereon adapted to actuate said support tocarry said driving gear into mesh with said gear, a'key, av .connectionfrom said key to said member, and means for actuating said driving gearto `rotate said shaft, substantially as set forth.

19. The combination of a shaft, a gear thereon, a pivotally mountedsupport, a

driving rotatably mounted thereon, a

pivotally mounted member having a cam surface thereon adapted to actuatesaid sup? port te carry said driving gear into meshv with said gear, akey, a connection from said key to said member, and meansactuated by.the depression of a key` for actuating said driving i tially as setforth.

20. The combination 'of a shaft, gear thereon, a vpivotall mountedsupport, a driving gear 'rotate ly mounted thereon, a

gear to rot-atesaid shaft, substan-.

ist

Aa spring with said gear,

pivotally mounted, member having a cam surface thereon adapted toactuate said support to carry said driving gear into mesh Withsaidvgear, a key, a connection from said key to said member, means foractuating said driving gear to rotate said shaft, and means forpreventing excessive movement of said driving gear ivh'en so actuated,substantially as set forth.

2l. The combination of a`shaft,.a gear thereon, a pivotally mountedsupport, a driving gear rotatably mounted thereon, a pivotally mountedmember having a cam surface thereon adapted to aotuate said support tocarry said driving gear into mesh with said gear, a key, a connectionfrom said key to said member, means for actuating said driving gear torotate said shaft, for returning said driving gear, for limiting thereturn movement substantially as set and means of said driving gear,forth.

The combination of a shaft, a gear thereon, a pivotally mounted support,a driving gear rotatably mounted thereon, a pivotally mounted memberhaving a cam surface thereon adapted to actuate said support to carry akey, a .connection from said key to said member, means on said memberfor actuating said driving gear to rotate said shaft, means orlimitingthe movement of the driving gear actuated by said member, a spring forreturning the 'driving gear and means for limiting the movement actuatedby said spring, .substantially as set forth.

Q3. The combination of a shaft, a gear thereon, a movable support, adriving gear pivotally mounted thereon, a movable member having a camsurface thereonadapted to actuate said support to carry said drivinggear into mesh with said gear, a key, a connection from said key to saidmember, and means on said member for actuating said driving gear ltorotatesaid shaft, substantially as set forth.

24. The combination of a shaft, a gear thereon, a movable support, adrivinggear pivotallv mounted thereon, a movable member having a. camsurface thereon adapted to aetuate said support to/earry said drivinggear rinto mesh with said gear, a key, a connection from said key meanson said member for actuating said driving gear to rotate aid shaft, andmeans for limiting the movement of said driving gear when so actuated,substantially as set forth.

Q5. The combination of a shaft, a gear thereon, a movable support, adriving gear pivotally mounted thereon, a movable member having a camsurface thereon 'adaoted to actuate said sup'pxort to .carry saiddriving gear into mesh wit said gear, a key, a con.-

said driving gear into mesh to said member,

' free of 'the driving nection from said key to said member, means onsaid member for actuating said driving gear to rotate said shaft, andmeans 'on said member for enforcing complete movement thereof in bothdirections, subu stantially as set forth.

26. The combination `of thereon, a movable support, afdriving gearpivotally mounted thereon, means for moving said support to carry saiddriving gear into mesh with said gear, key-controlled mechanism vfor.actuating said drivingt gear,- and a projection on said driving geareoacting with said support to limit the movei ment of the driving gear,substantially as.

set forth.

27. The combination of a shaft, a gear thereon, a movable support, adriving gear pivotallynmounted thereon, means for moving said support tocarry said driving gear into mesh With said gear, an actuating memberfor said driving gear, key-controlled mechanism for reciprocating saidmember, said member being adapted to act-nate lthe driving gear whenmoving vin one direction and. to return free of said driving gear, andmeans4 for returning the driving gear to initial position, substantiallyassetfort-h. v

28. The combination of a shaft, a gear thereon, a movablesupport, adrivinggear pivotally mounted thereon, means for moving said support tocarry said driving gear into meshl With said gear, an actuating memberfor saiddriving gear, v key-controlled mechanism for reciprocating saidmember, teeth on said member. adapted to mesh with the teeth of thedriving gear, means onsaid member additional to said teeth for en gaging`and operating the driving gear, said member being adapted tonetnrn toinitial position Without actuatiiig ldie gear, and means for returningthe driving gear to initial position, substantially as set forth.

The Vcombination of a shaft, a plurality of gears thereon, a pluralityof driving gearscorresponding to said' gears, a plurality l ofkey-actuated reciprocating members 'any one of which may be actuated tomove the corresponding driving' gear; intofmesh with 'a gear on saidshaft, then actuate the driving gear a predetermined amount and thenreturn -to initial position gear, and means for returning the drivinggear to initial position, substantially as set forth.

30. The combination lof a. shaft, a plurality of gears thereon, aplurality of Adriving gears corresponding to sai( gears, a plurality ofkey-actuated -recipro'cating members any one of which may be actuatedtomove the corresponding driving gear into mesh with a gear onsaid shaft,then actuate the driving gear a predetermined amount and then ret-urntoinitial lposition treeA of the driving gear. means for return-v `ing thedriving gear toinitial position and.

. 31. The combination of a shaft, a plu 4Aa plurality of drivrality ofgears thereon, ing gearscorresponding to said gears, a

plurality of key-actuated reciprocating members any one of which maybeactuated to move the corresponding driving gear into mesh With a gearon said shaft, then vactuate the driving gear a predetermined amount andthen return to initial positionfree of the driving gear, means forreturning the driving. gear to mtlal posltion, and

means for insuring complete movement of said member in both directions,substantially as set forth.

32. The combination of a typewriting machine having a carriage, atotalizer, an operating gear for said totalizer ,and means actuated bysaid carriage for efecting relative movement of lsaid totalizer and gearcomprising a rack on. said carriage', a gear actuated thereby, saidgear, and said second rack against movement e'xcept When said vrack onthe 'carriagefis in engagement withl .said gear, substantially as setforth.

33. The lcombinatiom of a typewriting.

machine havingv a carriage, a totalizer, an operatinggear for saidtotalizer and means actuated by said carriage for. effectingrelacomprising a rack adjustably mounted on said carriage, two gearsmounted on thev mounted on the typewriter frame and coacting with saidrack, a second rack meshing with saidgear, a spring-actuated lockmounted on the typewriter frame and controlling said gear, and means onsaid carriage for releasing said lock and holding it released While therack-on the carriage is in coaction with said gear, substantially as setforth.

In a calculating machine the combination of a'totalizer having aplliralityof nimmer-wheels, a lmister-pinion, means for :wtuating themaster-pinionand for effecting relative movement of the master-pinionnumber Wheels thereon,

a second rack operate/d by' and means for locking said lgear' tivemovement of said totalizer and gear pinion land a typewriting lcentnumber-Wheels, a

and totalizer, a plurality` of pinions Aeach adapted to mesh .with anumber-Wheel, a lock for each pinion, means for moving each pLnion outof coaction With its lock, and

means for moving each lock out of coaction with its pinion,substantially as set forth.

, 36. In a calculating machine, the combination of a totalizer having aplurality of a master pinion, means for actuating the master-pinion andfor effecting relative movement of the master-pinion and totalizer,means for locking the number-Wheels of the totalizer, means forreleasing the number-Wheels to permit'of actuating them, land means Aforpositively actuating said locking means t lockthe number-Wheels afterthey have been rev leased, substantially as set forth. v

37. In a calculating machine, the combination of a totalizer having aplurality of number-Wheels, for actuating the master-pinion and foreffecting relativel step-by-step movement of the master pinion andvtotalizer, a plurality of locking mechanisms one for each numberwheel,means for actuating said locking mechanisms one at a time duringtherelative movement of the'master-pinion and totalizer so that only thenumber-Wheel in .coaction with the master-pinion will be un` lockedbyits locking mechanism, an alining device for accurately alining allthe number- Wheels of the totalizer andl means for actuating saidali-ning 'device once during eachl step of the relative movement ofthemastertotalizer, substantially as set forth.

38. In a calculating machine, the combination of a totalizer having aplurality of number-Wheels thereon a master-pinion, keyactuated devicesfor operating 'the master- .pinion, means for moving the master-pinion`step-by-step `to carry it into -position to operate the. number-wheelssuccessively, a lock for each number-Wheel, means moving With themaster-pinion for operating said locks to release ,the number-Wheels,and means moving with the master-pinion for operating said locks to'cause them to lock the number-wheels, substantially' 'as set' forth: y l.39. In a calculatin machine, a totalizer having a plurality 0%number-Wheels rotatable about the` same axis, to said axis, a pluralityof pinions on said shaft each adapted to mesh with tWo adjalockingdevice coacting with each of said pinions, and means for moving each ofsaid pinions axially to carry it into-and out of engagement with itslocking device, substantially as set forth.

40. In a calculating machine, a totali-zer having a plurality ofnumber-Wheels rotatable about the same axis, a shaft parallel to saidaxis, a plurality of pinions on said shaft a master-pinion, means' ashaft parallel i

